Cutting attachment for hosiery-looping machines



J. A. MARTIN AND R. L. LEE. CUTTING ATTACHMENT FOR HOSIERY LOOPING MACHINES.

APPLICATION FILED DEC-8I 1919.

1 74,940, Patented Apr. 19, 1921.

2 SHEETS-SHEET 1- 2? 2/ WITNESS: 5 Q3 INVENTORS.

2921M I JM/TTTORNEY.

J. A. MARTIN AND R. L. LEE.

CUTTING ATTACHMENT FOR HOSIERY LOOPING MACHINES.

APPLICATION FILIED DEC. 8.1919.

1,374,940. Patented Apr. 19,1921.

2 SHEETS-SHEET 2.

O INVENTORS.

Jflmczrtw'v By L a e/ M ATTORNEY.

UNITED STATES PATENT orrice.

JUNIU'S A. MARTIN AND ROBERT- L. LEE, or DURHAM, NORTH CAROLINA;'SAID LEE ASSIGNOR, BY MESNE ASSIGNMENTS, OF BIS RIGHT MACHINERY COMPANY, OF DURHAM, NORTH CAROLINA, A CORPORATION OF NORTH CAROLINA.

CUTTING ATTACHMENT FOR HOSIERY-LOOPIN G MACHINES.

" Specification of Letters Patent.

Patented Apr. 19', 1921.

Application filed December 8, 1919. Serial No. 343,262.

To (ZZZ whom it may concern I Be it knownthat we, JUN-IUS A. MARTIN and ROBERT L. LE citizens of the United States, residing at urham, in the-county of Durham and State of North Carolina, have invented new and useful Improvements in Cutting Attachments for Hosiery-Looping Machines, of which the following is a specification.

This invention pertains to an improved thread-cutting attachment for fabrlc sewing or looping machines. More specifically the structure is designed to be employed in conjunction with machines wherein sections of stockings are sewed together to produce a complete stocking, the operation being such as to leave a. uniting chain threadbetween successively completed stockings, which chain must be out adjacent each of said.

stockings. In other words, each chain section between adjacent stockings must be first cut close (or relatively so) to one stock;

ing, and thereafter to the next or adjacent stocking. w j

The present structure is such that the chain thread will be automatically severed between each pair of stockings and a section of such thread bodily removed leaving'at each end of the seam produced a short or relatively short end. This double cutting or severance between each pair of stockings does awa with the long thread attached to each stoc ing! and does away with the necessity. of any after trimming of such lon end which occurs in various machines o this type heretofore proposed. The structure is also such that it may be readily attached to any if not all of the so-calledlooping machines now on the market; Moreover, it contains but few arts,'ma be economically produced and 1s not lia le to get out of order or become disarran ed. The invention is shown illustrated in the annexed drawings, wherein,- Figure 1 is a top plan view of the cutting attachment shown as applied to a looping machine Fig. 2 is an enlarged plan View of the attachment;

Fig. 3 an inverted plan view of the same;

Fig. 4 a side elevation as seen from the inner side of the structure;

Fig. 5 an elevation as, viewed from the by, the

other side, the drivin ulle bein artl broken away to disclosfi the pdlygon l l fnifez F g. 6 a front end elevation;

F g. 7 a rear end elevation;

F1 8 a transverse section taken through the ivmg. pulley, the rotary'knife and the brush;

Fig. 9 a top plan view or member with the brush knife and pulley and the mounting therefor removed; and

.Flg. 10 a side elevation of a guard or guide plate.

Asshown by dotted lines in Fig. 1, 1 denotes a fixed portion of the circular frame a looplng machine having the usual revoluble annulus which is continuously rotated, and provided with a series of equi-distantly spaced points 2 upon which the stockin or socks to be sewn are placed, as is wel understood by those skilled in the art.

The present structure ma be said to comprise a base member 3- a apted to be attached to the fixed frame 1 by means of a bolt 4. An adjusting screw 4 passes through the frame and bears upon of the'fixed portion of the looper and by proper manipulation of the bolt 4 and the screw 4 the forward curved edge 5 of the base 3 may be brought in proper relation to the annulus and the points carried thereplroper position being indicated in he base plate "or member 3 is prefof the base plate era ly cut away adjacent .one side, as at 6,

'to Fig. 5, is slotted adjacent its rear end To GARROLINA AUTOMATIC the upper face and is held in its fixed adjusted osition by a bolt 10 which passes'through t e slot and through the upstanding portlon of the rearwardly projecting arm 7. Said bolt also serves as the means'for securing a thread guide platell in position with reference to the fixed shearing blade and the base plate 3. As will be seen upon reference to F i 10 the upper edge of the guide plate is downwardly curved toward its outer end-or forward end and the under face of its outer end-is cut away as at 12, so that when the guide plate is secured in position over the base 3, a throat or channel is formed between .the upper face of the base plate and the outer cut-away end of the guide'plate, forming an opening through which the thread chain may be drawn, in the manner hereinafter set forth. The lower wall of the throat is formed upon a radius slightly eater than the radius of the brush, as indicated in Figs. 4 and 9. The fixed shearing blade 9 is, as will be seen upon reference to Fig. 5, curvedat its outer end, the curvature being such that the lower portion of the blade extends forward of the remainder of the cutting edge and is in alinement with the curved forward edge 5 of the base. The base 3 is provided with an upstanding lug or bracket 13 to which is pivotally secured by a screw 14, a lever 15, the lever carrying "an adjustable stop screw 16, the lower end of which contacts with an abutment 17 formed as an integral portion of the base and limits the ownward movement of the lever and the parts In the outer end of the lever and extending at right angles thereto is secured a fixed shaft 18 upon which is mounted a pulley 19 having an elongated hub 20, which hub is reduced and threaded as at 21. Mounted upon such reduced hub section is a fiat disk-like knife or shearing" blade 22,'and adjacent to said blade and between it and the lever is mounted a circular brush member 23, the body portion 24 whereof, bears directly against the adjacent side face of the disk-like rotary knife 22, said elements beingheld in direct con-' tact with each other and locked for rotation with the hub and pulley by a nut 25 mounted upon the reduced threaded portion 21 of the hub. A spring 26 encircles the shaft 18 and bearing against lock nuts 27 tends to force the. ulley, its hub and the parts carried thereby laterally toward the lever 15 and as a consequence when the parts are in their final position, to force the rotary 9, as will be best understood upon reference to Fig. 6, where it will be seen that the blades overlap. Moreover, as w1ll e seen upon reference to said figure, the tufts of the brush 23 run between the fixed blade 9 and the adjacent parallel guide plate 11. In other words, the fixed blade and the uide plate form a throat or runway t hrough which the brush passes and by which, through the action of the brush, the severed-end of the thread is drawn.- As

will be best seen upon reference to Fig. 5,

the rotary knife or shearing blade 22 is olygonal in outline and that it always overaps the fixed shearing blade 9, When, however, the blade is rotated in the direction of the arrow (Fig. from the position shown in said figure, it will be seen knife and cutter blade 22 into facewise contact with the fixed shearlng blade that the rotary blade will overlap the fixed ment should be such that the shearing blades overlap and that the brush tufts occupy a position within the throat or way formed between the fixed blade and guide plate 11 and touch or nearly touch the curved bottom face of the throat at its forward or intake end and receding therefrom toward the rear of the throatway (see Fig. 5).

In operation as the stitched stockings with the connecting chain thread between them are carried along in front of and in proximity scribed, the brush while it contacts the seamed portion of the stocking does not to the cutting mechanism above dedraw it inwardly owing to the impalement of the stocking upon the points 2, nor does the brush act to draw that portion ofthe chain which is immediately adjacent to the stocking against the fixed knife, this by reason of the fact that the chain at such point is held outwardly by its attachment to the impaled stocking. When, however, the stocking is moved on for a slight distance past the brush and shearing mechanism the chain thread which is more or less slack by reason of its not being supported in any way, will be drawn inwardly by the brush and againstthe forward curved face of the fixed knife and through the rotation of the polygonal shaped rotary blade said rotary blade will make a shearing cut, and sever the thread. The severed end is then carried b the brush up between the fixed knife or blade and the guideplate 11, the thread end being carried rearwardly by the brush along the upper curved face of the throat, it be proaches the fixed knife the thread will be held against further inward movement by the brush, this owing to the fact that the thread is then held outwardly by its attachment to the oncoming stocln'ng. This has the effect of again carryin the thread at a point adjacent to it's'attaciiment to the oncoming stocking across the fixed blade where it is again severed by the continuously r0- tating cutter or blade. Thus it will be seen that a section of the chain thread is bodily removed between two adjacent stockings and the length of the projecting ends upon each stocking will be found to be substantially the same. ';The operation willbe continued so 1011 as the stockings are fed forward with t e intermediate chain thread between them. It is to be noted that there is no intermittent motion of the movable cutting knife, but on the other hand that it rotates continuously and that there is.only one part which is subject to any wear and that is the hub which is mounted upon the shaft. The blades may be readily removedfor sharpening when required and by reason of the number of faces which are present upon the rotary blade or cutter it does not have to be sharpened or renewed except at long intervals; 5 v

The length of thread left adjacent each stocking may be readily predetermined by the adjustment of the fixed blade or knife 9. If the blade is moved outwardly toward the points upon Y which the stockings are supported the thread will be cut or severed close to the stocking; if it isadjusted inwardly from the points, the section remaining attached to the stocking will be longer. Thus by a simple adjustment of the fixed blade the length of the attached or remaining thread end at each end of the seam, or

to each side of the stocking, may be readily determined and controlle The term fixed as employed in the claims in referring to the blade 9, is to be understood as meaning one which is fixed or stationary when in operation and is not to be construed as precluding adjustment, which, as above noted, is provided andis of importance.

What is claimed is:

1. In a device of the class described, the

combination of a fixed blade; a constantly rotating blade; and a brush rotatable with said last named blade, said brush having its axis of rotation located above the path of movement of the thread to be out, said brush lying adjacent to and working in conjunc tion with the fixed blade to deflect the thread into operative relation therewith.

2. In combination with a looping machine having a plurality of impaling points arranged in circular series and upon which the fabric tolbe stitched is placed; a fixed knife standing adjacent the path of travel of said pins; a rotatable knife, the axis whereof lies above the ath of movement of the points, said rotatab e knife overlappin the fixed knife; and a brush movable wit said rotatable knife and adapted to contact the chain stitch between the stitched material and to deflect the same into contact with the fixed knife.

3. In a device of the character described, the combination of a supporting element adapted to be secured to a looping machine; a fixed knife carried thereby; a guard plate also secured to the supporting element and ,brush likewise supported by the shaft, said brush at its lower portion extending into the throatway.

4. In a device of the character described, the combination of a supporting element adapted to be secured to a looping machine;

a fixed knife carried thereby; a guard plate also secured to the supporting element and forming a throatway with said blade; a shaft arranged above said throatway; a disk-like knife having a plurality of straight cutting ed es mounted for rotation about the shaft; an a brush likewise mounted'on the shaft, said brush at its lower portion extendinginto the throatway.

. 6; In a device of the character described,

the combination of a supporting element adapted to be secured to a looping machine; a fixed knife secured thereto having a vertically disposed upwardly and rearwardly curved ed e; a shaft 1 ing above said knife;

a rotary isk-likeknife polygonal inform supported by the shaft; anda rotary circular brush also supported by saidshaft adjacent the knife.

7. In a device of the character described, the combination of a su porting. element adapted to be secured to a ooping machine; a knife secured thereto with its cutting edge standing in a vertical position; an arm pivoted to said support means for maintaining the arm in adjusted relation to the blade; a shaft secured in said arm; a disk-like knife mounted for rotation about the shaft; and a flat circular brush also mounted for rotation about the shaft, said brush and disk knife standing at opposite sides of the fixed knife and overla ping the same.

8. In a eVice of the character specified,

the combination of a su porting member; a knife secured thereto with its forward cutting edge standing ina vertical plane, the

upper surface of the support to one side of the body of the knife inclining upwardly for rotation about the shaft, said brush extending into the throatway.

9. In a device of the character described, the combination of a suporting member having an upwardly and rearwardly inclined surface; a knife adjustably secured to the member adjacent one side of said inclined surface, the forward sharpened end of the knife being curved and-standing in a vertical plane; a guard .plate standing in substanknife; a shaft mounted in the outer end of the arm; means for regulating the descent of the arm toward the supporting member; a disk-like knife, polygonal in outline supported on the shaft; and a circular brush likewise supported by the shaft, said brush at its lower peripheral portion contacting the inclined surface aforesaid and standing between the fixed knife and the guard plate.

10. In a device of the character described, the combination of a supporting element adapted to be secured to a looping machine; a normally fixed blade adjustable toward and from the fabric supporting points of the looping machine; a rotary knife cooperating with the fixed blade; and a brush taining points; a knife having a verticallyv disposed cutting edge arranged adjacent said points, said-knife being adjustable toward and from said points; means for securing the knife in its adjusted position; a rotatable blade cooperating with the knife; and a brush rotatable with said blade, said brush engaging the chain thread between adjacent stitched fabrics and serving to draw the chain into contact with the fixed knife. j v

In testimony whereof we afiix our signa-c tures.

JUNIUS A. MARTIN. ROB-T. L. LEE. 

